1838672205049 has 2 divisors, whose sum is σ = 1838672205050. Its totient is φ = 1838672205048.

The previous prime is 1838672205047. The next prime is 1838672205067. The reversal of 1838672205049 is 9405022768381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1816815539449 + 21856665600 = 1347893^2 + 147840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838672205049 - 2¹ = 1838672205047 is a prime.

Together with 1838672205047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1838672205043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919336102524 + 919336102525.

It is an arithmetic number, because the mean of its divisors is an integer number (919336102525).

It is a 1-persistent number, because it is pandigital, but 2⋅1838672205049 = 3677344410098 is not.

Almost surely, 2^{1838672205049} is an apocalyptic number.

It is an amenable number.

1838672205049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838672205049 is an equidigital number, since it uses as much as digits as its factorization.

1838672205049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 1838672205049 in words is "one trillion, eight hundred thirty-eight billion, six hundred seventy-two million, two hundred five thousand, forty-nine".